1/* System description file for MS-DOS
2
3   Copyright (C) 1993, 1996, 1997, 2001, 2002, 2003, 2004,
4                 2005, 2006, 2007 Free Software Foundation, Inc.
5
6This file is part of GNU Emacs.
7
8GNU Emacs is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GNU Emacs is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GNU Emacs; see the file COPYING.  If not, write to
20the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21Boston, MA 02110-1301, USA.  */
22
23/* Note: lots of stuff here was taken from s-msdos.h in demacs. */
24
25
26/*
27 *	Define symbols to identify the version of Unix this is.
28 *	Define all the symbols that apply correctly.
29 */
30
31/* #define UNIPLUS */
32/* #define USG5 */
33/* #define USG */
34/* #define HPUX */
35/* #define UMAX */
36/* #define BSD4_1 */
37/* #define BSD4_2 */
38/* #define BSD4_3 */
39/* #define BSD_SYSTEM */
40/* #define VMS */
41#ifndef MSDOS
42#define MSDOS
43#endif
44
45#ifdef __GO32__
46#ifndef __DJGPP__
47#define __DJGPP__ 1	/* V2 defines __DJGPP__ == 2 */
48#endif
49#else
50You lose; /* Emacs for DOS must be compiled with DJGPP */
51#endif
52
53#define DOS_NT	/* MSDOS or WINDOWSNT */
54#undef BSD_SYSTEM
55#undef VMS
56
57/* SYSTEM_TYPE should indicate the kind of system you are using.
58 It sets the Lisp variable system-type.  */
59
60#define SYSTEM_TYPE "ms-dos"
61
62#define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
63
64/* NOMULTIPLEJOBS should be defined if your system's shell
65 does not have "job control" (the ability to stop a program,
66 run some other program, then continue the first one).  */
67
68#define NOMULTIPLEJOBS
69
70/* Emacs can read input using SIGIO and buffering characters itself,
71   or using CBREAK mode and making C-g cause SIGINT.
72   The choice is controlled by the variable interrupt_input.
73   Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
74
75   SIGIO can be used only on systems that implement it (4.2 and 4.3).
76   CBREAK mode has two disadvantages
77     1) At least in 4.2, it is impossible to handle the Meta key properly.
78        I hear that in system V this problem does not exist.
79     2) Control-G causes output to be discarded.
80        I do not know whether this can be fixed in system V.
81
82   Another method of doing input is planned but not implemented.
83   It would have Emacs fork off a separate process
84   to read the input and send it to the true Emacs process
85   through a pipe.
86*/
87
88/* #define INTERRUPT_INPUT */
89
90/* Letter to use in finding device name of first pty,
91  if system supports pty's.  'a' means it is /dev/ptya0  */
92
93/* #define FIRST_PTY_LETTER 'a' */
94
95/*
96 *	Define HAVE_PTYS if the system supports pty devices.
97 */
98
99/* #define HAVE_PTYS */
100
101/*
102 *	Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
103 *      The 4.2 opendir, etc., library functions.
104 */
105
106/* #define NONSYSTEM_DIR_LIBRARY */
107
108#define SYSV_SYSTEM_DIR
109
110/* Define this symbol if your system has the functions bcopy, etc. */
111
112#define BSTRING
113
114/* Define this is the compiler understands `volatile'.  */
115#define HAVE_VOLATILE
116
117
118/* subprocesses should be defined if you want to
119   have code for asynchronous subprocesses
120   (as used in M-x compile and M-x shell).
121   This is generally OS dependent, and not supported
122   under most USG systems. */
123
124#undef subprocesses
125
126/* If your system uses COFF (Common Object File Format) then define the
127   preprocessor symbol "COFF". */
128
129#define COFF
130
131/* define MAIL_USE_FLOCK if the mailer uses flock
132   to interlock access to /usr/spool/mail/$USER.
133   The alternative is that a lock file named
134   /usr/spool/mail/$USER.lock.  */
135
136/* #define MAIL_USE_FLOCK */
137
138/* Define CLASH_DETECTION if you want lock files to be written
139   so that Emacs can tell instantly when you try to modify
140   a file that someone else has modified in his Emacs.  */
141
142/* #define CLASH_DETECTION */
143
144/* Here, on a separate page, add any special hacks needed
145   to make Emacs work on this system.  For example,
146   you might define certain system call names that don't
147   exist on your system, or that do different things on
148   your system and must be used only through an encapsulation
149   (Which you should place, by convention, in sysdep.c).  */
150
151/* Avoid incompatibilities between gmalloc.c and system header files
152   in how to declare valloc.  */
153#define GMALLOC_INHIBIT_VALLOC
154
155/* setjmp and longjmp can safely replace _setjmp and _longjmp,
156   but they will run slower.  */
157
158#define _setjmp setjmp
159#define _longjmp longjmp
160
161#if __DJGPP__ < 2
162
163#define NO_MODE_T
164
165/* New chdir () routine.
166   DJGPP v2.0 and later doesn't need it because its chdir() does
167   set the drive itself. */
168#ifdef chdir
169#undef chdir
170#endif
171#define chdir sys_chdir
172
173#define LIBS_SYSTEM -lpc  /* isn't required in DJGPP v2.0, either */
174
175#endif /* __DJGPP__ < 2 */
176
177#if __DJGPP__ > 1
178
179#define DATA_START  (&etext + 1)
180#define TEXT_START  &start
181#define TEXT_END    &etext
182
183#define _NAIVE_DOS_REGS
184
185#else /* not __DJGPP__ > 1 */
186
187/* This somehow needs to be defined even though we use COFF.  */
188#define TEXT_START -1
189
190#endif /* not __DJGPP__ > 1 */
191
192#define ORDINARY_LINK
193
194/* command.com does not understand `...` so we define this.  */
195#define LIB_GCC -Lgcc
196#define DONT_NEED_ENVIRON
197#define SEPCHAR ';'
198
199#define NULL_DEVICE "nul"
200
201#if __DJGPP__ < 2
202#define O_RDONLY        0x0001
203#define O_WRONLY        0x0002
204#define O_RDWR          0x0004
205#define O_CREAT         0x0100
206#define O_TRUNC         0x0200
207#define O_EXCL          0x0400
208#define O_APPEND        0x0800
209#define O_TEXT          0x4000
210#define O_BINARY        0x8000
211#define NO_MATHERR
212#endif
213
214#define HAVE_INVERSE_HYPERBOLIC
215#define FLOAT_CHECK_DOMAIN
216
217/* When $TERM is "internal" then this is substituted:  */
218#define INTERNAL_TERMINAL "pc|bios|IBM PC with colour display:\
219:co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
220:se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
221:AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
222
223/* Define this to a function (Fdowncase, Fupcase) if your file system
224   likes that */
225#define FILE_SYSTEM_CASE Fmsdos_downcase_filename
226
227/* Define this to be the separator between devices and paths */
228#define DEVICE_SEP ':'
229
230/* We'll support either convention on MSDOG.  */
231#define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
232#define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
233
234/* Call init_gettimeofday when TZ changes.  */
235#if __DJGPP__ < 2
236#define LOCALTIME_CACHE
237#define tzset init_gettimeofday
238#endif
239
240/* bcopy under djgpp is quite safe */
241#define GAP_USE_BCOPY
242#define BCOPY_UPWARD_SAFE 1
243#define BCOPY_DOWNWARD_SAFE 1
244
245/* Mode line description of a buffer's type.  */
246#define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
247
248/* Do we have POSIX signals?  */
249#if __DJGPP__ > 1
250#define POSIX_SIGNALS
251#endif
252
253/* We have (the code to control) a mouse.  */
254#define HAVE_MOUSE
255
256/* We canuse mouse menus.  */
257#define HAVE_MENUS
258
259/* We have support for faces.  */
260#define HAVE_FACES
261
262/* Define one of these for easier conditionals.  */
263#ifdef HAVE_X_WINDOWS
264/* We need a little extra space, see ../../lisp/loadup.el */
265#define SYSTEM_PURESIZE_EXTRA 15000
266#define HAVE_X11R5
267#define LIBX11_SYSTEM -lxext -lsys
268#else
269/* We need a little extra space, see ../../lisp/loadup.el */
270#define SYSTEM_PURESIZE_EXTRA 50000
271#endif
272
273/* Tell the garbage collector that setjmp is known to save all
274   registers relevant for conservative garbage collection in the
275   jmp_buf.  */
276
277#define GC_SETJMP_WORKS 1
278#define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
279
280/* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
281   (do not change this comment) */
282